“When we were shooting the video for ‘Knock Knock,’ usually each person spent about an hour and a half filming their part. Sana and I secretly watched Park Jin Young shoot his scene. It only took him five minutes! He was a real pro,” she revealed.

TWICE then personally thanked Park Jin Young for appearing on the music video for them.

The ladies released the special album “TWICEcoaster: LANE 2” on February 20. Within the first 24 hours of the song’s release, title track “Knock Knock” not only received an all-kill on digital music charts, but over 9 million views on YouTube.

TWICE will be performing their first music show stage for the song on February 23 during Mnet’s “M!Countdown.”